/** @file
  Implement TPM2 Object related command.

Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved. <BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include <IndustryStandard/UefiTcgPlatform.h>
#include <Library/Tpm2CommandLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>

#pragma pack(1)

typedef struct {
  TPM2_COMMAND_HEADER       Header;
  TPMI_DH_OBJECT            ObjectHandle;
} TPM2_READ_PUBLIC_COMMAND;

typedef struct {
  TPM2_RESPONSE_HEADER       Header;
  TPM2B_PUBLIC               OutPublic;
  TPM2B_NAME                 Name;
  TPM2B_NAME                 QualifiedName;
} TPM2_READ_PUBLIC_RESPONSE;

#pragma pack()

/**
  This command allows access to the public area of a loaded object.

  @param[in]  ObjectHandle            TPM handle of an object
  @param[out] OutPublic               Structure containing the public area of an object
  @param[out] Name                    Name of the object
  @param[out] QualifiedName           The Qualified Name of the object

  @retval EFI_SUCCESS      Operation completed successfully.
  @retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2ReadPublic (
  IN  TPMI_DH_OBJECT            ObjectHandle,
  OUT TPM2B_PUBLIC              *OutPublic,
  OUT TPM2B_NAME                *Name,
  OUT TPM2B_NAME                *QualifiedName
  )
{
  EFI_STATUS                                 Status;
  TPM2_READ_PUBLIC_COMMAND                   SendBuffer;
  TPM2_READ_PUBLIC_RESPONSE                  RecvBuffer;
  UINT32                                     SendBufferSize;
  UINT32                                     RecvBufferSize;
  TPM_RC                                     ResponseCode;
  UINT8                                      *Buffer;
  UINT16                                     OutPublicSize;
  UINT16                                     NameSize;
  UINT16                                     QualifiedNameSize;

  //
  // Construct command
  //
  SendBuffer.Header.tag = SwapBytes16(TPM_ST_NO_SESSIONS);
  SendBuffer.Header.commandCode = SwapBytes32(TPM_CC_ReadPublic);

  SendBuffer.ObjectHandle = SwapBytes32 (ObjectHandle);

  SendBufferSize = (UINT32) sizeof (SendBuffer);
  SendBuffer.Header.paramSize = SwapBytes32 (SendBufferSize);

  //
  // send Tpm command
  //
  RecvBufferSize = sizeof (RecvBuffer);
  Status = Tpm2SubmitCommand (SendBufferSize, (UINT8 *)&SendBuffer, &RecvBufferSize, (UINT8 *)&RecvBuffer);
  if (EFI_ERROR (Status)) {
    return Status;
  }

  if (RecvBufferSize < sizeof (TPM2_RESPONSE_HEADER)) {
    DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - RecvBufferSize Error - %x\n", RecvBufferSize));
    return EFI_DEVICE_ERROR;
  }
  ResponseCode = SwapBytes32(RecvBuffer.Header.responseCode);
  if (ResponseCode != TPM_RC_SUCCESS) {
    DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - responseCode - %x\n", SwapBytes32(RecvBuffer.Header.responseCode)));
  }
  switch (ResponseCode) {
  case TPM_RC_SUCCESS:
    // return data
    break;
  case TPM_RC_SEQUENCE:
    // objectHandle references a sequence object
    return EFI_INVALID_PARAMETER;
  default:
    return EFI_DEVICE_ERROR;
  }

  //
  // Basic check
  //
  OutPublicSize = SwapBytes16 (RecvBuffer.OutPublic.size);
  if (OutPublicSize > sizeof(TPMT_PUBLIC)) {
    DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - OutPublicSize error %x\n", OutPublicSize));
    return EFI_DEVICE_ERROR;
  }

  NameSize = SwapBytes16 (ReadUnaligned16 ((UINT16 *)((UINT8 *)&RecvBuffer + sizeof(TPM2_RESPONSE_HEADER) +
                          sizeof(UINT16) + OutPublicSize)));
  if (NameSize > sizeof(TPMU_NAME)) {
    DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - NameSize error %x\n", NameSize));
    return EFI_DEVICE_ERROR;
  }

  QualifiedNameSize = SwapBytes16 (ReadUnaligned16 ((UINT16 *)((UINT8 *)&RecvBuffer + sizeof(TPM2_RESPONSE_HEADER) +
                                   sizeof(UINT16) + OutPublicSize +
                                   sizeof(UINT16) + NameSize)));
  if (QualifiedNameSize > sizeof(TPMU_NAME)) {
    DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - QualifiedNameSize error %x\n", QualifiedNameSize));
    return EFI_DEVICE_ERROR;
  }

  if (RecvBufferSize != sizeof(TPM2_RESPONSE_HEADER) + sizeof(UINT16) + OutPublicSize + sizeof(UINT16) + NameSize + sizeof(UINT16) + QualifiedNameSize) {
    DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - RecvBufferSize %x Error - OutPublicSize %x, NameSize %x, QualifiedNameSize %x\n", RecvBufferSize, OutPublicSize, NameSize, QualifiedNameSize));
    return EFI_DEVICE_ERROR;
  }

  //
  // Return the response
  //
  Buffer = (UINT8 *)&RecvBuffer.OutPublic;
  CopyMem (OutPublic, &RecvBuffer.OutPublic, sizeof(UINT16) + OutPublicSize);
  OutPublic->size = OutPublicSize;
  OutPublic->publicArea.type = SwapBytes16 (OutPublic->publicArea.type);
  OutPublic->publicArea.nameAlg = SwapBytes16 (OutPublic->publicArea.nameAlg);
  WriteUnaligned32 ((UINT32 *)&OutPublic->publicArea.objectAttributes, SwapBytes32 (ReadUnaligned32 ((UINT32 *)&OutPublic->publicArea.objectAttributes)));
  Buffer = (UINT8 *)&RecvBuffer.OutPublic.publicArea.authPolicy;
  OutPublic->publicArea.authPolicy.size = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
  Buffer += sizeof(UINT16);
  if (OutPublic->publicArea.authPolicy.size > sizeof(TPMU_HA)) {
    DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - authPolicy.size error %x\n", OutPublic->publicArea.authPolicy.size));
    return EFI_DEVICE_ERROR;
  }

  CopyMem (OutPublic->publicArea.authPolicy.buffer, Buffer, OutPublic->publicArea.authPolicy.size);
  Buffer += OutPublic->publicArea.authPolicy.size;

  // TPMU_PUBLIC_PARMS
  switch (OutPublic->publicArea.type) {
  case TPM_ALG_KEYEDHASH:
    OutPublic->publicArea.parameters.keyedHashDetail.scheme.scheme = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    switch (OutPublic->publicArea.parameters.keyedHashDetail.scheme.scheme) {
    case TPM_ALG_HMAC:
      OutPublic->publicArea.parameters.keyedHashDetail.scheme.details.hmac.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_XOR:
      OutPublic->publicArea.parameters.keyedHashDetail.scheme.details.xor.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      OutPublic->publicArea.parameters.keyedHashDetail.scheme.details.xor.kdf = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    default:
      return EFI_UNSUPPORTED;
    }
  case TPM_ALG_SYMCIPHER:
    OutPublic->publicArea.parameters.symDetail.algorithm = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    switch (OutPublic->publicArea.parameters.symDetail.algorithm) {
    case TPM_ALG_AES:
      OutPublic->publicArea.parameters.symDetail.keyBits.aes = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      OutPublic->publicArea.parameters.symDetail.mode.aes = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_SM4:
      OutPublic->publicArea.parameters.symDetail.keyBits.SM4 = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      OutPublic->publicArea.parameters.symDetail.mode.SM4 = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_XOR:
      OutPublic->publicArea.parameters.symDetail.keyBits.xor = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_NULL:
      break;
    default:
      return EFI_UNSUPPORTED;
    }
    break;
  case TPM_ALG_RSA:
    OutPublic->publicArea.parameters.rsaDetail.symmetric.algorithm = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    switch (OutPublic->publicArea.parameters.rsaDetail.symmetric.algorithm) {
    case TPM_ALG_AES:
      OutPublic->publicArea.parameters.rsaDetail.symmetric.keyBits.aes = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      OutPublic->publicArea.parameters.rsaDetail.symmetric.mode.aes = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_SM4:
      OutPublic->publicArea.parameters.rsaDetail.symmetric.keyBits.SM4 = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      OutPublic->publicArea.parameters.rsaDetail.symmetric.mode.SM4 = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_NULL:
      break;
    default:
      return EFI_UNSUPPORTED;
    }
    OutPublic->publicArea.parameters.rsaDetail.scheme.scheme = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    switch (OutPublic->publicArea.parameters.rsaDetail.scheme.scheme) {
    case TPM_ALG_RSASSA:
      OutPublic->publicArea.parameters.rsaDetail.scheme.details.rsassa.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_RSAPSS:
      OutPublic->publicArea.parameters.rsaDetail.scheme.details.rsapss.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_RSAES:
      break;
    case TPM_ALG_OAEP:
      OutPublic->publicArea.parameters.rsaDetail.scheme.details.oaep.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_NULL:
      break;
    default:
      return EFI_UNSUPPORTED;
    }
    OutPublic->publicArea.parameters.rsaDetail.keyBits = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    OutPublic->publicArea.parameters.rsaDetail.exponent = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT32);
    break;
  case TPM_ALG_ECC:
    OutPublic->publicArea.parameters.eccDetail.symmetric.algorithm = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    switch (OutPublic->publicArea.parameters.eccDetail.symmetric.algorithm) {
    case TPM_ALG_AES:
      OutPublic->publicArea.parameters.eccDetail.symmetric.keyBits.aes = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      OutPublic->publicArea.parameters.eccDetail.symmetric.mode.aes = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_SM4:
      OutPublic->publicArea.parameters.eccDetail.symmetric.keyBits.SM4 = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      OutPublic->publicArea.parameters.eccDetail.symmetric.mode.SM4 = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_NULL:
      break;
    default:
      return EFI_UNSUPPORTED;
    }
    OutPublic->publicArea.parameters.eccDetail.scheme.scheme = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    switch (OutPublic->publicArea.parameters.eccDetail.scheme.scheme) {
    case TPM_ALG_ECDSA:
      OutPublic->publicArea.parameters.eccDetail.scheme.details.ecdsa.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_ECDAA:
      OutPublic->publicArea.parameters.eccDetail.scheme.details.ecdaa.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_ECSCHNORR:
      OutPublic->publicArea.parameters.eccDetail.scheme.details.ecSchnorr.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_ECDH:
      break;
    case TPM_ALG_NULL:
      break;
    default:
      return EFI_UNSUPPORTED;
    }
    OutPublic->publicArea.parameters.eccDetail.curveID = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    OutPublic->publicArea.parameters.eccDetail.kdf.scheme = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    switch (OutPublic->publicArea.parameters.eccDetail.kdf.scheme) {
    case TPM_ALG_MGF1:
      OutPublic->publicArea.parameters.eccDetail.kdf.details.mgf1.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_KDF1_SP800_108:
      OutPublic->publicArea.parameters.eccDetail.kdf.details.kdf1_sp800_108.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_KDF1_SP800_56a:
      OutPublic->publicArea.parameters.eccDetail.kdf.details.kdf1_SP800_56a.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_KDF2:
      OutPublic->publicArea.parameters.eccDetail.kdf.details.kdf2.hashAlg = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
      Buffer += sizeof(UINT16);
      break;
    case TPM_ALG_NULL:
      break;
    default:
      return EFI_UNSUPPORTED;
    }
    break;
  default:
    return EFI_UNSUPPORTED;
  }

  // TPMU_PUBLIC_ID
  switch (OutPublic->publicArea.type) {
  case TPM_ALG_KEYEDHASH:
    OutPublic->publicArea.unique.keyedHash.size = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    if(OutPublic->publicArea.unique.keyedHash.size > sizeof(TPMU_HA)) {
      DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - keyedHash.size error %x\n", OutPublic->publicArea.unique.keyedHash.size));
      return EFI_DEVICE_ERROR;
    }
    CopyMem (OutPublic->publicArea.unique.keyedHash.buffer, Buffer, OutPublic->publicArea.unique.keyedHash.size);
    Buffer += OutPublic->publicArea.unique.keyedHash.size;
    break;
  case TPM_ALG_SYMCIPHER:
    OutPublic->publicArea.unique.sym.size = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    if(OutPublic->publicArea.unique.sym.size > sizeof(TPMU_HA)) {
      DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - sym.size error %x\n", OutPublic->publicArea.unique.sym.size));
      return EFI_DEVICE_ERROR;
    }
    CopyMem (OutPublic->publicArea.unique.sym.buffer, Buffer, OutPublic->publicArea.unique.sym.size);
    Buffer += OutPublic->publicArea.unique.sym.size;
    break;
  case TPM_ALG_RSA:
    OutPublic->publicArea.unique.rsa.size = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    if(OutPublic->publicArea.unique.rsa.size > MAX_RSA_KEY_BYTES) {
      DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - rsa.size error %x\n", OutPublic->publicArea.unique.rsa.size));
      return EFI_DEVICE_ERROR;
    }
    CopyMem (OutPublic->publicArea.unique.rsa.buffer, Buffer, OutPublic->publicArea.unique.rsa.size);
    Buffer += OutPublic->publicArea.unique.rsa.size;
    break;
  case TPM_ALG_ECC:
    OutPublic->publicArea.unique.ecc.x.size = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    if (OutPublic->publicArea.unique.ecc.x.size > MAX_ECC_KEY_BYTES) {
      DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - ecc.x.size error %x\n", OutPublic->publicArea.unique.ecc.x.size));
      return EFI_DEVICE_ERROR;
    }
    CopyMem (OutPublic->publicArea.unique.ecc.x.buffer, Buffer, OutPublic->publicArea.unique.ecc.x.size);
    Buffer += OutPublic->publicArea.unique.ecc.x.size;
    OutPublic->publicArea.unique.ecc.y.size = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
    Buffer += sizeof(UINT16);
    if (OutPublic->publicArea.unique.ecc.y.size > MAX_ECC_KEY_BYTES) {
      DEBUG ((DEBUG_ERROR, "Tpm2ReadPublic - ecc.y.size error %x\n", OutPublic->publicArea.unique.ecc.y.size));
      return EFI_DEVICE_ERROR;
    }
    CopyMem (OutPublic->publicArea.unique.ecc.y.buffer, Buffer, OutPublic->publicArea.unique.ecc.y.size);
    Buffer += OutPublic->publicArea.unique.ecc.y.size;
    break;
  default:
    return EFI_UNSUPPORTED;
  }

  CopyMem (Name->name, (UINT8 *)&RecvBuffer + sizeof(TPM2_RESPONSE_HEADER) + sizeof(UINT16) + OutPublicSize + sizeof(UINT16), NameSize);
  Name->size = NameSize;

  CopyMem (QualifiedName->name, (UINT8 *)&RecvBuffer + sizeof(TPM2_RESPONSE_HEADER) + sizeof(UINT16) + OutPublicSize + sizeof(UINT16) + NameSize + sizeof(UINT16), QualifiedNameSize);
  QualifiedName->size = QualifiedNameSize;

  return EFI_SUCCESS;
}
